From f2c5bc150e609a78185ea63c84fce7718f56e28a Mon Sep 17 00:00:00 2001 From: Alexander Motin Date: Fri, 4 Feb 2022 16:06:38 -0500 Subject: [PATCH] Add more control/visibility to spa_load_verify(). Use error thresholds from policy to control whether to scrub data and/or metadata. If threshold is set to UINT64_MAX, then caller probably does not care about result and we may skip that part. By default import neither set the data error threshold nor read the error counter, so skip the data scrub for faster import. Metadata are still scrubbed and fail if even single error found. While there just for symmetry return number of metadata errors in case threshold is not set to zero and we haven't reached it. Reviewed-by: Brian Behlendorf Reviewed-by: Pavel Zakharov Signed-off-by: Alexander Motin Closes #13022 --- include/sys/fs/zfs.h | 1 + module/zfs/spa.c | 20 +++++++++++++++++--- 2 files changed, 18 insertions(+), 3 deletions(-) diff --git a/include/sys/fs/zfs.h b/include/sys/fs/zfs.h index 213e36787c7e..e7fc2f459e18 100644 --- a/include/sys/fs/zfs.h +++ b/include/sys/fs/zfs.h @@ -838,6 +838,7 @@ typedef struct zpool_load_policy { /* Rewind data discovered */ #define ZPOOL_CONFIG_LOAD_TIME "rewind_txg_ts" +#define ZPOOL_CONFIG_LOAD_META_ERRORS "verify_meta_errors" #define ZPOOL_CONFIG_LOAD_DATA_ERRORS "verify_data_errors" #define ZPOOL_CONFIG_REWIND_TIME "seconds_of_rewind" diff --git a/module/zfs/spa.c b/module/zfs/spa.c index d35e14c795bb..7e18048af5e6 100644 --- a/module/zfs/spa.c +++ b/module/zfs/spa.c @@ -2251,6 +2251,7 @@ spa_claim_notify(zio_t *zio) } typedef struct spa_load_error { + boolean_t sle_verify_data; uint64_t sle_meta_count; uint64_t sle_data_count; } spa_load_error_t; @@ -2291,6 +2292,9 @@ static int spa_load_verify_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) { + zio_t *rio = arg; + spa_load_error_t *sle = rio->io_private; + (void) zilog, (void) dnp; if (zb->zb_level == ZB_DNODE_LEVEL || BP_IS_HOLE(bp) || @@ -2303,12 +2307,12 @@ spa_load_verify_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, */ if (!spa_load_verify_metadata) return (0); - if (!BP_IS_METADATA(bp) && !spa_load_verify_data) + if (!BP_IS_METADATA(bp) && + (!spa_load_verify_data || !sle->sle_verify_data)) return (0); uint64_t maxinflight_bytes = arc_target_bytes() >> spa_load_verify_shift; - zio_t *rio = arg; size_t size = BP_GET_PSIZE(bp); mutex_enter(&spa->spa_scrub_lock); @@ -2346,7 +2350,8 @@ spa_load_verify(spa_t *spa) zpool_get_load_policy(spa->spa_config, &policy); - if (policy.zlp_rewind & ZPOOL_NEVER_REWIND) + if (policy.zlp_rewind & ZPOOL_NEVER_REWIND || + policy.zlp_maxmeta == UINT64_MAX) return (0); dsl_pool_config_enter(spa->spa_dsl_pool, FTAG); @@ -2357,6 +2362,13 @@ spa_load_verify(spa_t *spa) if (error != 0) return (error); + /* + * Verify data only if we are rewinding or error limit was set. + * Otherwise nothing except dbgmsg care about it to waste time. + */ + sle.sle_verify_data = (policy.zlp_rewind & ZPOOL_REWIND_MASK) || + (policy.zlp_maxdata < UINT64_MAX); + rio = zio_root(spa, NULL, &sle, ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); @@ -2400,6 +2412,8 @@ spa_load_verify(spa_t *spa) spa->spa_load_txg_ts); fnvlist_add_int64(spa->spa_load_info, ZPOOL_CONFIG_REWIND_TIME, loss); + fnvlist_add_uint64(spa->spa_load_info, + ZPOOL_CONFIG_LOAD_META_ERRORS, sle.sle_meta_count); fnvlist_add_uint64(spa->spa_load_info, ZPOOL_CONFIG_LOAD_DATA_ERRORS, sle.sle_data_count); } else {